Oh my! The iPhone 5 has officially gone on sale this morning at 8am in the United States and eight oversea markets and already U.S. carrier Sprint has burned through its initial allotment of devices. The company just reported it sold out of the iPhone 5 at many of its retail stores on East Coast, just hours after the device went on sale. The stores will remain “seriously constrained” until Sprint receives additional devices from Apple…

At this time, the majority of East Coast Sprint-branded retail stores are seriously constrained or sold out of iPhone 5 inventory provided to us by Apple. Our stores will be resupplied as soon as additional devices are received from Apple.

To help with high demand, the carrier has a wait list where customers can buy a $50 gift card and secure their spot when the next batch of devices become available.